I have the same problem with my TH-46PZ85U. Previously when you turned the unit on either via the power button, there were two separate and distinct clicks. Now there are origional two clicks, a short pause, then the third click. At this time the power light button blinks 10 times, pauses and repeats.
I had read that the three 220v 900 MDF power supply capacitors might be bad. This could be verfied if the top of the capicators were convex (domed as if swollen). Mine were so I replaced all three. Easy to desolder and solder in the new ones (making sure of the correct polairty), but not so easy to remove the seemingly 100 or so screws to get the board out.
Unfortunatley, this did not address the problem, as I still have the 3 clicks of death, followed by the 10 blinks of death. Now I am reading that there may be another power supply board or a 1 MDF capacitor on a sub-board that is fault producing. I dont mind putting a hundred bucks or so into self repairs for this $1,000 three year old TV, so if anyone can give a definitive answer as to the cause and/or has successfully repaired their unit, it would be appreciated.
As an aside, I bought the capacitors from Mouser Electronics (www.mouser.com
), and I have no affiliation or financial interest with that company.